I'm almost always the umpire when I play D&D, and when I've run D&D in the past 15-20 years it's almost always been SJ-based homebrew... or Mario-based homebrew... as those are my favoritest fantasy-type settings. I raid other D&D settings for elements, for concepts and content, but at the end of the day what I actually run is homebrew and it's homebrew whose primary inspirations revolve around a handful of published settings.